The v stands for ventourri. These are the "barrels" in a caburator. a 2-v is a 2 barrel, and a 4-v is a 4 barrel carb. Obviously, a 4v is the carb of choice. Get a good caburator book to understand the fine points. I think Holly or Demon is the carb of choice. I bet most will agree with me here.
Rev
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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
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